First, the function will be called, and num will be set equal to 4.

首先，这个函数会被调用，num会设置为4。

youdao

Now, in the new call to factorial, num is set to 3.

现在，在新一次调用factorial时，num被设置为3。

youdao

This means that if stop is ever true, num must have been set to 100.

这意味着如果stop曾经是true,num一定曾被设置成100。

youdao

This means that if stop is ever true, num must have been set to 100.

这意味着如果stop曾经是true,num一定曾被设置成100。

youdao